This European Standard contains requirements, test and assessment methods, marking, labelling and packaging applicable to overfill prevention devices with closure device. The devices are usually composed by — sensor, — evaluation device, — closure device. Overfill prevention devices intended to be used in/with underground and/or above ground, non-pressurized, static tanks designed for liquid fuels.NOTE Liquid fuel means liquids for internal combustion engines, heating/cooling boilers and generators.